William sawyeb



W. SA-WYER. Artificial Resistance for Electric Light Circuits.

No. 228,123. Patented May 25,1880.

N.PETERs, PHOTO-LITHOGRAPNEK WASHINGTON, D C

UNITED STATES WILLIAM SAWTYER,

PATENT OFFICE.

OF NEW YORK, N. Y.

ARTIFICIAL RESISTANCE FOR ELECTRIC-LIGHT CIRCUITS.

SPECIFICATION forming part of Letters Patent No. 228,123, dated May 25,1880.

Application filed January 19, 1880.

skilled in the art to which it appertains to' make and use the same.

The object of my invention is to provide for the powerful currents ofelectricity employed in electric lighting such resistances, when needed,as will be at once cheap and effective, and have sufficient surface forradiation to prevent any damage from their electrical heating.

In the drawings accompanying and constituting a part of thisspecification, Figure l is a side view, and Fig. 2 is an end view, ofthe aparatus. I

Like letters indicate like parts in both drawings.

A is any suitable non-conducting base. I employ slate or soap-stone onaccount of the heat generated in the resistance by the passage of thecurrent.

B B are two metal holders, to which the wires leading to the resistanceare connected in any suitable manner, (not shown,) and these holders aresecured to the base by the screws 0 C. I prefer to make the holders ofbrass, casting the metal in the shape shown in the drawings; but almostany other metal will answer the requirements.

Through the opening in the holders passes the carbon rod D, perfectconnection being made between the rod and the holders by slips ofplatinum, E.

F F are slips of brass, iron, or copper, and these are pressed firmlydown, so as to clamp the carbon rod in place by means of the screws G G.

In another application I have shown and described the operation of myinvention, and I have therefore not deemed it necessary in the presentapplication to do more than make clear the mechanical construction ofthe apparatus. The carbon rod D is intended to equal in electricalresistance the resistance of a lamp in circuit, and when the circuit ofa lamp is interrupted to take the place of the lamp, and thus not onlypreserve the continuity of the circuit, but maintain its resistance thesame as before the circuit of the lamp was interrupted. It may obviouslyas Well take the place of more than one lamp, and this form ofresistance may be employed whenever it ance of a circuit, the currententering by way of one of the metal holders B, through any suitableconnection, (not shown,) and leaving by way of the other metal holder B.

Having thus described my invention, what I claim as such, and desire tosecure by Letters Patent, is-

The combination of a rod of carbon having suitable metallic holders witha plate of soapstone or other non-conducting and non-combustiblematerial as a resistance in the circuit of an electric-lightingapparatus.

WVM. SAWYER.

Witnesses:

LEONARD SAWYER, J osEPH Goonnrcn, Jr.

is desired to artificially increase the resist

